UAV Propeller Acoustic State Detection
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Solution Overview
Problem
Current UAV systems lack a simple and effective method for detecting flight states, leading to poor controllability and safety during flight.
Innovation Solution
A method and system that includes a propeller operation state collector on the UAV to acquire and process operation state signals, determining the flight state of the UAV, and a wearable device to receive and process these signals for remote control adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If no propeller operation state collector is installed, then the device complexity is low, but the flight state detection capability is insufficient
Solution Approach 1:
The patent replaces complex mechanical flight state detection systems with acoustic field-based detection. The propeller operation state collector uses acoustic sensors to detect propeller operation states through sound signals, substituting mechanical sensors and reducing overall system complexity while maintaining detection capability.
Solution Approach 2:
The patent introduces an acoustic field as an intermediary between the propeller and the detection system. Instead of directly measuring mechanical parameters, the system uses acoustic signals propagated through the air medium to indirectly detect propeller operation states, simplifying the detection mechanism.
2Reliability
If real-time flight state detection is implemented, then the controllability and safety are improved, but the use of energy increases
Solution Approach 1:
The patent implements continuous acoustic monitoring of propeller operation states during flight. The propeller operation state collector continuously captures acoustic signals, enabling real-time detection without interrupting flight operations, thus maintaining safety while managing energy consumption through efficient continuous monitoring.
Solution Approach 2:
The system establishes a feedback loop where acoustic detection results are transmitted to the ground station, which processes the data and sends control commands back to the UAV. This feedback mechanism enables real-time safety monitoring and control adjustments, improving reliability while optimizing energy usage through intelligent control.
3Measurement precision
If acoustic field-based propeller detection is used, then the detection capability is improved, but the object-generated harmful factors increase due to noise interference
Solution Approach 1:
The patent converts the harmful acoustic noise generated by propellers into a useful detection signal. By using the propeller's own operational noise as the detection medium, the system eliminates the need for separate active sensing, reducing additional noise generation while improving detection accuracy through acoustic signal analysis.
Solution Approach 2:
The system analyzes changes in acoustic signal characteristics (frequency, amplitude, spectrum) to detect propeller operation states. By monitoring variations in the acoustic 'color' or spectral properties rather than absolute noise levels, the system achieves accurate detection while tolerating the presence of operational noise.
Data Source
AI summary
An unmanned aerial vehicle, a method for detecting a flight state thereof, and a wearable device (500) are disclosed. The method comprises: disposing a propeller operation state collector (302) for collecting an operation state signal of a propeller (301) on at least one support arm (303) of the UAV (S101); acquiring the operation state signal of the propeller (301) collected by the propeller operation state collector (302) (S102); processing the operation state signal to obtain an operation state of the propeller (301) (S103); and determining the flight state of the UAV according to the operation state of the propeller (301) (S104). By disposing the propeller operation state collector (302) on the support arm (303) of the UAV to collect the operation state signal of the propeller (301), and then calculating the flight state of the UAV according to the operation state signal, better flight control of the UAV can be achieved by making use of the detected flight state of the UAV, and an desired flight trajectory can be obtained, thereby improving the controllability and safety during the flight of the UAV.